# Cherry Creek Pit

- **MSHA mine ID:** 3503332
- **Status:** Abandoned
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Klamath, OR
- **Operator:** Knife River Corporation-Northwest
- **Controller:** Knife River Corporation
- **Public source rows linked:** 232
- **Source coverage:** 10 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Knife River Corporation (0176802) → Knife River Corporation-Northwest (L16679) → Cherry Creek Pit (3503332)**

Current identity source: `msha-mines`. This is a current snapshot, not a historical claim.

## Controller and operator valid-time history

- **Keith  Hamilton → Jefferson State Redi-Mix:** 1989-04-01 through 2005-06-08; derived from co-tenure at mine 3503332; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Rogue Aggregates Inc:** 2005-06-09 through 2010-08-17; derived from co-tenure at mine 3503332; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Knife River Corporation-Northwest:** 2010-08-18 through 2023-05-31; derived from co-tenure at mine 3503332; source `msha-controller-operator-history`.
- **Knife River Corporation → Knife River Corporation-Northwest:** 2023-06-01 through current/open; derived from co-tenure at mine 3503332; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 11
- Interval anomalies: 0
- Valid-time bounds: inclusive; date granularity; null end means open-ended in the upstream history row; not independent proof of present control.
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 41 violation rows across the full record; 6 carry an S&S flag and $3,598 appears in current assessed amounts.
3. **HEALTH — 6 samples:** Occupational health samples 6 personal. 0 personal-sample rows have a published C/E ratio above 1; 0 noise rows have an action-level or PEL dose above 100%. These are separate measures, not a silica exceedance count. Silica results and sample status are shown separately.
4. **PRODUCTION — 0 tons:** Quarterly production and employment 0 employee hours and 0 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 6 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 6 conference records linked by issuance number.
6. **CONTRACTORS — 0 linked entities:** Contractors Contractors are linked through this mine’s violation or accident records. Their production and hours cover all their operations, so they are not included in this mine’s totals.
7. **INSPECTIONS — 0 since 2021:** Inspections 19 inspection events and 306 published inspection hours across the historical record.

## EIA annual operating context

No matched record in the 2024 EIA coal-public workbook. This may be inapplicable for a non-coal operation.

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 56.1000 — Notification of commencement of operations and closing of mines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-A/section-56.1000
- **30 CFR 56.14132 — Horns and backup alarms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **30 CFR 56.14107 — Moving machine parts.** (5 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.12004 — Electrical conductors.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **30 CFR 47.44 — Temporary, portable containers.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.44
- **30 CFR 56.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300

## Source coverage

- **Addresses of Record:** 1 rows; 2016-12-05 through 2016-12-05; source ID `msha-addresses`
- **Assessed Violations:** 41 rows; 2001-04-26 through 2009-12-01; source ID `msha-assessed-violations`
- **Conferences:** 6 rows; 2003-07-08 through 2003-07-08; source ID `msha-conferences`
- **Controller and Operator History:** 4 rows; 1989-04-01 through 2010-08-18; source ID `msha-controller-operator-history`
- **Inspections:** 19 rows; 2000-05-16 through 2011-10-13; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 95 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 18 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Metal and Nonmetal Personal Health Samples:** 6 rows; 2001-10-31 through 2002-04-10; source ID `msha-personal-health-samples`
- **Violations:** 41 rows; 2001-04-26 through 2009-12-01; source ID `msha-violations`

## Caveats

- This is public-record decision support, not legal advice or an official MSHA record.
- Missing data can indicate no event, publication delay, an unresolved identity, or inapplicability.
- Contractor production data is entity-level and is not attributed to this mine.

## Alternate representations

- HTML: `/mines/cherry-creek-pit-3503332`
- JSON: `/api/v1/mines/cherry-creek-pit-3503332`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3503332/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3503332/relationships`
- MCP resource: `mine://3503332/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`